540M: The Core i5-540M has only 3 MB L3 Cache (compared to the I7-620M) and clocks between 2.53-3.06 GHz (Turbo Mode). Thanks to Hyperthreading, 4 threads can be processed simultaneously. An integrated graphics card (GMA HD 3150) and a DDR3 memory controller are also included in the package.» Further information can be found in our Comparison of Mobile Processsors.

14.0":

Above all, this display size is used for subnotebooks, ultrabooks and convertibles. For all three types, this size is quite large. The biggest variety of subnotebooks is represented with this size.

Large display-sizes allow higher resolutions. So, details like letters are bigger. On the other hand, the power consumption is lower with small screen diagonals and the devices are smaller, more lightweight and cheaper.